title: Monomeric carbohydrates production from olive tree pruning biomass: modeling of dilute acid hydrolysis.
abstract: Statistical modeling and optimization of dilute sulfuric acid hydrolysis of olive tree pruning biomass has been performed using response surface methodology. Central composite rotatable design was applied to assess the effect of acid concentration, reaction time and temperature on efficiency and selectivity of hemicellulosic monomeric carbohydrates to d-xylose. Second-order polynomial model was fitted to experimental data to find the optimum reaction conditions by multiple regression analysis. The monomeric d-xylose recovery 85% (as predicted by the model) was achieved under optimized hydrolysis conditions (1.27% acid concentration, 96.5°C and 138 min), confirming the high validity of the developed model. The content of d-glucose (8.3%) and monosaccharide degradation products (0.1% furfural and 0.04% 5-hydroxymethylfurfural) provided a high quality subtract, ready for subsequent biochemical conversion to value-added products.
authors.affiliation: Department of Chemical, Environmental and Material Engineering, University of Jaén, 23071 Jaén, Spain.
authors.forename: Juan G
authors.initials: JG
authors.lastname: Puentes
authors.forename: Soledad
authors.initials: S
authors.lastname: Mateo
authors.forename: Bruno G
authors.initials: BG
authors.lastname: Fonseca
authors.forename: Inês C
authors.initials: IC
authors.lastname: Roberto
authors.forename: Sebastián
authors.initials: S
authors.lastname: Sánchez
authors.forename: Alberto J
authors.initials: AJ
authors.lastname: Moya
mesh_terms: D000704:Analysis of Variance; D018533:Biomass; D002241:Carbohydrates / Q000096:biosynthesis*; D005947:Glucose / Q000378:metabolism; D006868:Hydrolysis / Q000187:drug effects; D008962:Models, Theoretical; D031658:Olea / Q000737:chemistry* / Q000187:drug effects; D013464:Sulfuric Acids / Q000494:pharmacology*; D014197:Trees / Q000737:chemistry* / Q000187:drug effects; D014866:Waste Products / Q000032:analysis*; D014990:Xylans / Q000378:metabolism; D014994:Xylose / Q000096:biosynthesis
chemical_list: D002241:Carbohydrates; D013464:Sulfuric Acids; D014866:Waste Products; D014990:Xylans; D014994:Xylose; D005947:Glucose; C033158:sulfuric acid
keywords: Biorefinery; Hemicellulose; Statistical modeling; d-Glucose; d-Xylose